Baby name help please

Ok so I am pregnant with my 3rd girl this will be it for me. I have an almost 9 yr old from a previous relationship named Abigayle my fiance has 2 girls from a previous relationship named Ceylon and Madison. Me and my fiance have an 8month old named Serenity and I'm 18weeks pregnant with my 3rd girl. I'd love something unique and fitting as this is my last a friend said Treasure Leanne which I think is cool but looking for other possible ideas. Any suggestions